.pQd

training for frontline drone operators

by .pQd
we ware on 3 day training led by a guy who spent 1 year on Ukrainian front lines operating reconnaissance and kamikaze drones. brain dump of some of the tidbits i’ve learned: interviews with the trainer: what we’ve heard about the reality of drone war is very close to what you can learn e.g. from ... Read More

manticore search available via ClickHouse

by .pQd
i’m a big fan of ClickHouse; over time it became central hub for any sort of business intelligence analytics. at work we replicate data to it, use dictionaries loaded over http and mysql, recently – we’re also using MySQL table or database functions to be able to run queries with joins across data from various ... Read More

rsync without retransmitting moved files

by .pQd
i’m using rsync a lot; both at work [ backups, replication of content to various servers, ad-hoc copying ] and privately. it’s smart enough to avoid re-sending the whole file if it has grown a bit [ like logs like to do ] or only few bytes changed in source or destination. out-of-the-box rsync is ... Read More

Ideas: rsync-like tool parallelizing transfer of large files

by .pQd
i use rsync heavily for backups, batch jobs and one-off tasks. every day it moves around terabytes of data for me. while it’s great – saves time and bandwidth, it could make even better use of modern hardware – multicore, and often with plenty of unused storage IOps: one day, when i’ll have some spare ... Read More

splitting ebook in one mp3 into multiple files

by .pQd
my daughter likes to listen to audiobooks; some of them come from youtube, some are multi-hour long. it’s easier to listen, re-listen if book is chopped into shorter chapter-alike files. how do i do it? yt-dlp is a swiss army knife for downloading audio/video from multiple hosting services mp3splt allows to split mp3 files in ... Read More

Hong Kong, again

by .pQd
i got yet another chance to travel to Hong Kong. i’ve spent there 9 days in October this year. what did change since my previous visit in 2018? what did not change: few places that i’ve hiked around for the first time: Lamma Island – i got there with a ferry from Central. concrete path ... Read More

beko dishwasher showing e01 code

by .pQd
our dishwasher stopped working, displayed E01 code and whenever closed was running drain pump all the time. i’ve called their support and learned it’s a known anti-flood feature and is caused by water that leaked gradually out of dishwasher and stayed in its base. solution? makes you wonder why does the water leak out of ... Read More

random things that inspire me

by .pQd
SQLite’s code of ethics: https://www.sqlite.org/codeofethics.html altamira’s ten investment commandments

New supermicro server does not ‘see’ some of NVMe drives

by .pQd
i got 3 identical new servers from supermicro – SYS-121C-TN10R. all three have the same disk setup – 2+4 NVMe drives, but Debian 12 just see 5 of them instead of 6. when i run dmesg on newly installed system i can see those errors: to solve it i had to change PCIe bifurcation in ... Read More

charging Amazfit Band 5

by .pQd
i’m a happy user of Amazfit Band 5. it’s dirt cheap, paired with gadgetbridge – works fine without sharing any data with cloud-hosted big brother, all in all – it helps to keep me moving around each day. i had few occasions when i needed to charge it [ every ~2 weeks ] and did ... Read More

Fastly returning “Requested host does not match any Subject Alternative Names (SANs) on TLS certificate”, HTTP/421

by .pQd
due to $reasons we have an nginx-proxy that is a reverse proxy forwarding to Fastly CDN which, in turn, forwards back to our infrastructure. starting from the 2024-02-27 this stopped working, for some HTTP queries. most notably those using OPTION verb. response that nginx was getting from Fastly had HTTP/421 status code and payload: colleague ... Read More

Ohook – activating MS office

by .pQd
this might be useful, especially for environments where automated tests of MS-office-dependent applications are done: https://massgrave.dev/ohook.html + https://github.com/asdcorp/ohook